LT1-LT4 Modifications 1993-97 Gen II Small Block V8

car shuts off while driving.

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Old 03-23-2009, 01:43 PM
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Default car shuts off while driving.

well ive been having this major problem with my car. today it happend twice. once while i was parking the car just shut off before i finished parking. second time when i was going back home i was coming to a stop light and the car shut off before i even stopped at like 30 mph.... so it kinda seems to be doing it while decelerating. but also on the highway sometimes i step on the gas to go a little faster and it kind of bogs and then starts up again.and when it turns off it ussualy dosent start for a while or a couple of cranks. spark plugs are new. and was doing it before i changed them. just not as often. really need this fixed since its my only car...
Old 03-23-2009, 04:13 PM
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Originally Posted by 93cz28
well ive been having this major problem with my car. today it happend twice. once while i was parking the car just shut off before i finished parking. second time when i was going back home i was coming to a stop light and the car shut off before i even stopped at like 30 mph.... so it kinda seems to be doing it while decelerating. but also on the highway sometimes i step on the gas to go a little faster and it kind of bogs and then starts up again.and when it turns off it ussualy dosent start for a while or a couple of cranks. spark plugs are new. and was doing it before i changed them. just not as often. really need this fixed since its my only car...
Any codes?
I would get your ICM tested. You said you thought it happens when decelerating, so I'd hook up a vacuum gauge to see if you have a vacuum leak. Test your fuel pressure, that never hurts.
Old 03-23-2009, 04:42 PM
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I freakin told him to test fuel pressure today at school and he refused lol
Old 03-23-2009, 05:28 PM
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i cleaned the IAC and now its idling really smooth. gotta see if it still turns off though.
Old 03-23-2009, 06:04 PM
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what is the ICA?
Old 03-23-2009, 06:14 PM
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Originally Posted by nik1703
what is the ICA?
IAC = Idle Air Control valve.
Old 03-23-2009, 06:23 PM
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ahhh i see. on my beamer it was called the ICV. silly germans.
Old 03-23-2009, 06:30 PM
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where is the iac
Old 03-23-2009, 06:35 PM
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Originally Posted by PonyEater8788
where is the iac
I think its adjacent to the throttle body. Someone correct me if Im wrong...
Old 03-23-2009, 06:36 PM
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Originally Posted by Z28_LT1
I think its adjacent to the throttle body. Someone correct me if Im wrong...
http://shbox.com/1/iac3.jpg
Old 03-23-2009, 06:37 PM
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Originally Posted by ss.slp.ls1
nice. looks like you just unbolt it and clean it up a bit.
Old 03-23-2009, 06:40 PM
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Originally Posted by nik1703
nice. looks like you just unbolt it and clean it up a bit.
Yes, you can try that. Getting all the gunk off with some carb/TB cleaner usually does the trick, otherwise a new GM replacement IAC it is...assuming that's the problem.
Old 03-23-2009, 08:19 PM
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Originally Posted by ss.slp.ls1
Yes, you can try that. Getting all the gunk off with some carb/TB cleaner usually does the trick, otherwise a new GM replacement IAC it is...assuming that's the problem.
yea it was pretty dirty. cleaned it with wd-40. good enuff. it idles really really smooth now.it feels weird.cant even hear my LM1 at idle anymore. b4 i could. well see tmm if the car keeps turning off though. ill keep u guys posted. might run a fuel pressure check also.
Old 03-23-2009, 08:28 PM
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spun muffler bearings



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